Data commit

Task/Safe-addition/Go/safe-addition.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+    "fmt"
+    "math"
+)
+
+// type requested by task
+type interval struct {
+    lower, upper float64
+}
+
+// a constructor
+func stepAway(x float64) interval {
+    return interval {
+        math.Nextafter(x, math.Inf(-1)),
+        math.Nextafter(x, math.Inf(1))}
+}
+
+// function requested by task
+func safeAdd(a, b float64) interval {
+    return stepAway(a + b)
+
+}
+
+// example
+func main() {
+    a, b := 1.2, .03
+    fmt.Println(a, b, safeAdd(a, b))
+}